Time Between Two Dates
Difference in days and hours.
Dates are interpreted in your browser's local timezone.
Pick both dates.
How to use
Choose start and end datetimes. The tool shows total milliseconds plus a day/hour/minute/second breakdown; duration is always positive (absolute difference if end precedes start).
Swap flips the two fields in one click when you picked them in reverse order.
For intra-day shifts or events, set hours and minutes carefully; remember to roll dates across midnight for overnight spans.